Hour of the Zombie (異骸‐THE PLAY DEAD/ALIVE-, Igai: The Play Dead/Alive) is a manga series written and illustrated by Tsukasa Saimura. It is set at a high school where students suddenly become zombies. The manga was serialized in Tokuma Shoten's manga magazine Monthly Comic Ryū beginning in 2014. The series ended in the final print issue of Comic Ryū on May 19, 2018. The manga is licensed in the United States by Seven Seas Entertainment.